This made me laugh hysterically!  I don't know who thinks of these things, but it's priceless.

The group Improv Everywhere pulled one of the greatest pranks ever.  They had a group of 100 people pretend to have camped out in front of a dollar store for Black Friday.  Then they rushed into the store when it opened.  They even had a fake TV reporter out there interviewing passersby about what they were seeing.  Good stuff!